A mathematical model of soil moisture spatial distribution on the hill slopes of the Loess Plateau  

作　　者：傅伯杰 杨志坚 王仰麟 张平文 

机构地区：[1]不详

出　　处：《Science China Earth Sciences》2001年第5期395-402,共8页中国科学（地球科学英文版）

基　　金：This work was jointly supported by the National Natural Science Foundation of China (Grant No.49725101) and the Chinese Academy of Sciences (Grant No. KZCX2-405). The authors thank Mr. Michael F. Dadd from U.K. for improving the English of the manuscri

摘　　要：Based on important factors that affect soil moisture spatialdistribution, such as the slope gradients, land use, vegetation cover, and surface water diffusion characteristics together with field measurements of soil moisture data obtained from the surface soil under different land use struc-tures, a soil moisture spatial distribution model was established. The diffusion degree coefficient of surface water for different vegetations was estimated from soil moisture values obtained from field measurements. The model can be solved using the finite unit method. The soil moisture spatial distribution on the hill slopes in the Loess Plateau were simulated by the model. A comparison of the simulated values with measurement data shows that the model is a good fit.Based on important factors that affect soil moisture spatial distribution, such as the slope gradients, land use, vegetation cover, and surface water diffusion characteristics together with field measurements of soil moisture data obtained from the surface soil under different land use structures, a soil moisture spatial distribution model was established. The diffusion degree coefficient of surface water for different vegetations was estimated from soil moisture values obtained from field measurements. The model can be solved using the finite unit method. The soil moisture spatial distribution on the hill slopes in the Loess Plateau were simulated by the model. A comparison of the simulated values with measurement data shows that the model is a good fit.

关 键 词：Loess Plateau hill slope soil moisture mathematical model 

分 类 号：X144[环境科学与工程—环境科学]